Kevin McCarthy's replacement and down-ballot drama: What to watch for in Tuesday's elections

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Four states are holding primaries Tuesday, while California voters will select a replacement for former Speaker Kevin McCarthy, giving Republicans a little more breathing room in the House.

With two Republicans competing in a special election in California’s 20th District, the GOP is sure to add a new member to its slim House majority. And voters in Georgia, Oregon, Kentucky and Idaho will head to the polls for primaries. All of the action is focused on House races, which will set matchups in key battlegrounds and decide likely future lawmakers in less competitive open seats. 

Polls close in Kentucky at 6 and 7 p.m. ET, with the state split into two time zones; 7 p.m. ET in Georgia; 10 and 11 p.m. ET in Idaho; and 11 p.m. ET in California. Oregon conducts its elections entirely by mail, and ballots must be returned or postmarked by 11 p.m. ET Tuesday. 

Here are four things to watch in Tuesday’s elections: